Gumming device for envelope-making machines



Dec. 17, 1929. F. J. PARKS GUMMING DEvIcE'FoR ENVELOPE MAKING MACHINES Filed Jan. 10'. 1928 l l UMP Ita ' 10 plying member.

Patented Dec. 17, 1929 UNITED STATES PATENT OFFICE FREDERICK 'LAMES PARKS, 0F CLEVELAND, OHIO, AS'SIGNOR OF ONE-HALE TO SHERMAN W. SGOFIELD, GF CLEVELAND, OI-IIO GUMMING DEVICE FOR ENVELOPE-MAKING MACHINES Application led January 10, 1928. Serial No. 245,684.

My invention particularly relates to devices of this character in which the feeding of the gum is controlled by the travel of the paper slip or envelope blank to which the gum is to be applied. The improvements provide accurate means for feeding the gum, means for easily adjusting said feeding means, means for preventing the gum caking or fouling, and means for eliiciently cleaning the gum-ap- The annexed drawing and the following description setforth in detail certain means embodying my invention, such means disclosing, however, but one of the forms in which the principle of the invention may be illustrated. 2

In said annexed drawing: Y Figure 1 is a fragmentary broken plan of an envelope machine in which-my improved 2o gumming device has been incorporated;

Figure 2 is a vertical longitudinal section, taken in the planes indicated by the line'2-2, Figure 1; Y y 4 Figure 3 is a view, upon an enlarged scale, of the gumming device proper as it appears in Figure2; p Y K i Figure 4 is a fragmentary vertical longitudinal section, upon anenlarged scale, taken in the plane indicated by the line 4 4, Figure 1; Y A y Figure 5 is a vertical transverse section, taken in the plane indicated by the line 5-5, Figure 3; and

Figure 6 is a fragmentary horizontal section, taken in the planes indicatedby the lines 6 6, Figure 3. A

, Referring to the annexed drawing in which the same parts are indicated by the same respective ordinals in the several views,

an envelope machine frame 1 supports plates forming a guide 2 down and through which an envelope 3 travels, beingrfed into said guide by any suitable feeding means from folding devices (not shown) which have transversely bent the original envelope blank toV form front and back envelopeplies and to form an envelope pocket and a closure flap adapted to be interlocked therewith, designated by the ordinal 16, Figure 3. The aforegoing description relates only to one form of envelope machine for thus transversely folding the envelopeblank, a .type of machine which is patented to me in U. S. Patents Nos. 1,316,737 and 1,580,441. Such a machine is mentioned simply for purposes of illustra-- tion inasmuch as the present invention relates only to certain gumming devices adapted to deposit gum 12 uponcertain portions 8 of the envelope whereby side enclosure portions 7 may be sealed down upon the envelope portions 8 to insure the closing of the lateral edges of the envelope, the latter having been scored adjacent its lateral edges to define the side enclosure members '7 by means of scoring rolls 4 and 5 adjustably'spaced by an intermediate roll 6 of any desired size to insure the desired spacing of the scoring rolls 4 and 5. This scoring of the envelope 3 is effected as it travels over suitable plates from the guide 2 to the particulargumming devices which will now be described.

The gum is derived through flexible conduits 9 from a suitable reservoir (not shown), well known to those skilled in the art, these conduits 9 emptying into containers 10 formed at their lower rear bottom edges with discharge apertures 11 controlled by metering screws 13, to permit as free a discharge of gum 12 as is desired upon gumming rollers 14 secured to a shaft 15 rotatablymounted in the frame 1. Gum cannot escape from the orifice-11 as long as the container 10 rests upon the wheel 14 andthus covers up ythe discharge outlet 11. The discharge of gum is permitted by tilting the rearl edge of the container 10 away from the roller 14. This action is started by the forwarddoubled pocket edge 16 of the envelope blank 3 in the following manner. At about the time the extreme edge of the folded portion 16 of the envelope3 is engaged by a pair of feed rollers 17 it intersects an upwardlyv curved ortion 19 of a finger 18 which extends rearwardly of the machine and isformed with an upwardly-extending portion 20 and then a return forwardly-extending portion 21 formed at its extreme end with a rfinger tip 22 disposed adjacently below an angular bar 26 secured by a screw 27to a'shaft 28 rotatably mounted in the frame 1. This fthel envelope;` side enclosure rportion shaft 28 is contained within slots 29 formed in the lower faces of a pair of the containers 10, the latter being secured to said shaft 28 by means of screws intersecting side mem-V wise direction, Figures `2 and 3, and acts as a pivot and the tip 22 of the Vfinger vportion 21 rocks the angle bar ymember 26 .which in turn rocks the vshaft 28 and the gum containers 10 xedly mounted thereon, in a counter-clockwise direction, and thus lifts the rear ends of the latter upwardly away from 'the rollers 14 and .permits gum to be discharged upon the said rollers which rotate in the direction indicated .by the arrow in Figure 3. This dischargeof the gum is permitted at about the time the forward edge of the envelope 3 lreaches the point indicated by the ordinal 19', Figure 3, land the distance fromthis .pointfto the line contact of the bottom .of the `rollers 14 withfthe envelope 3 is substantially Vequal to. one-half of the circumference of the rollers 14, so that gum is spread upon the portions 8 of the envelope 3 vby the rollers 14 Aat about the time the frontedge ofthe envelope reaches the rolll1ers 14. The'discharge of lgum is Vpermitted until the rear vedge of 4the envelope moves away from ithe area 19 and permits the angle 26 and the nger 18 to .reassume their norvmal positions under 'the action of a spring 40., the rollers 14, which continuously rotate, carrying',A gum to the remainder of the envelope sections v8 because o ffthe substantially equaldistances around one-half of the rollers-14 and between thepoint 19 and the ybottom edge of the rollers 14, hereinbefore explained.

Alfter the envelope .portions 8 are thus `gummed,vthe envelope is completed by de-V vices not pertinent to this invention consisting `.generally of feedv rolls 35, 36 and 37, devices 38and 39 `for progressively turning 7 down upon the guinmed body parts 8, etc.

In order that `gum may notaccumulate upon l.the side faces of the rollers 14 and dry thereon or ,otherwise foul -the machine and impair its efficiency, I providesc-raper mea-ns 'comprising a conduit elbow 31 adapted from one end to lead to a Ydrainv (not shown) and `formed `at the other end into an open-top mouth portion 32 formedv with; an opening in its end and bottom face permitting the roller 14 to rotate closely adjacent to a pair of inwardlyrextending spaced flanges or opening walls 33, the peripheral and feeding edge of the roller 14 being spaced somewhat vfrom the inner end wall ofA the `bottom opening, -as indicated by the ordinal 34, Figure 6. VVThereby the gum that escapes onto the side faces of the roller 14k is scraped olf by the ianges 33 and isdischarged through the conduit 31, while at the same time gum necessary for application to theenvelope 3 is carried through the space 34 by the periphery of the .roller 14.

What I claim is:

l. In gumming devices for envelope making machines, the combination of blank-feeding means; driven gumming rollers; pivotallyi-mounted gum containers formed Vwith orificesadapted to discharge `upon the peripheries .of said'rollers, said containers normally resting upon said rolle'rsto close said ori? fices; and means controlled by the movements of the blank for tilting said containers away from the rollers to' permit discharge yof gum from saidor'ifices.

2. In gumming devices for enyelope v,malring machines,the combination of blank-feeding means; driven gumming rollers; rpivotally-mounted gum containers formed ,with v orifices adapted to discharge upon theperipheries of said rollers, said kcontainers being adapted in one position to rest uponsaid rollersto close-said orifices; means controlled by the movements of the blank for tilting said containers in onedirection; and `means automatically moving said containers in the opposite direction when saidv tilting means are freed from said blank movements.

3. In gumming devices for envelope -making machines, the combination of blank-feeding means; driven gumming rollers; pivotally-mounted gum containers formed with orifices adapted to discharge upon the periphies of said rollers, said containers normally resting upon said rollers to close saidorilices, Y the mounting for said containers comprising a pivota1ly-supported shaft to which said containers are secured; a pivoted finger disposed in the path of blank movement so as to be actuated thereby; and means controlled by the actuation of said finger to turn said shaft and tilt said containers away from saidrollers. Y i .Y

4. In gumming devicesvfor envelope making machines, the combination of blank-feeding means; driven gumming rollers; pivotally-mounted gum containers formed with orifices adapted to discharge upon the peripheries of said rollers, said containers normally V resting upon said rollers to close said-orifices, y

the mounting for said containersV comprising a pivotally-supported shaft to which said containers are secured; a finger member secured intermediate its ends to said shaft; la spring normally holding one end of said member in one position; a linger having one end disposed in the path of blank movement; a pivoted shaft to which said finger is secured intermediate its ends, the other end of said finger being adapted to move the free end of said finger member against the action of said spring to tilt said containers away from said rollers.

5. Gum scraper means for envelope-gumming rollers comprising a conduit member formed with an open-top roller edge enclosing portion adapted to be spaced from the roller periphery and closely scraping the adjacent roller face portions.

6. Gum scraper means for envelope-gumming rollers comprising a conduit member formed at one end with an open-top portion having an end and bottom opening permitting the rotation of a roller therethrough, the Walls of said end opening closely scraping the roller faces, the inner end Wall of said bottom opening being spaced somewhat from the roller periphery.

Signed by me this 9th day of January, 1928.

FREDERICK JAMES PARKS. 

